飞机/外挂物组合体绕流的数值计算

 采用嵌合体埋入方法计算带外挂翼-身组合体复杂外形的流动，将飞机/外挂物外形的流动区域分为机翼-机身和外挂物两个子区域，在机翼-机身子域上求解欧拉方程，在外挂物子域上求解全速势方程，通过两个流场的耦合迭代计算全流场的解。对C-5A飞机及某战斗机的计算表明，数值模拟与实验吻合。实现了不同子域流场使用不同方程的计算方法。

TRANSONIC NUMERICAL SIMULATION FORW ING-BODY-PYLON-NACELLE CONF IGURATION

A ch imera grid2embedding technique is used to calculate the flow field fo r w ing2body2pylon2nacelle configurat ion. Th is technique subdivides the computat ional domain into simp lesubdomains w h ich adm it a mo re easily const ructed meshes. O n the basis of the analysis of inter2act ion info rmat ion on the inner and the outer boundaries of the overlap region, a t rilinear interpo lat ion in the isoparamet ric space is used in the embedding scheme fo r the data communicat ionamong subdomains. The so lut ion of the ent ire flow field can be obtained th rough an iterat ive calculat ion of coup ling flow fields. The t ransonic flow fo r w ingbodypylon2nacelle configurat ion ofC25A aircraft is calculated. The so lut ion of numerical simulat ion show s agreement w ith experimental data.